diff --git a/package.json b/package.json
index 2a070fb..38c963f 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "ethers": "^5.0.7"
   },
   "devDependencies": {
-    "@openzeppelin/contracts": "^3.1.0",
+    "@openzeppelin/contracts": "^4.4.2",
     "@truffle/hdwallet-provider": "^1.0.39",
     "chai": "^4.2.0",
     "eslint": "^7.5.0",
diff --git a/yarn.lock b/yarn.lock
index 8a69aeb..493879d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -390,10 +390,10 @@
     "@ethersproject/properties" "^5.0.0"
     "@ethersproject/strings" "^5.0.0"
 
-"@openzeppelin/contracts@^3.1.0":
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-3.1.0.tgz#bcea457ef89069fbe5a617f50b25b6a8272895d5"
-  integrity sha512-dVXDnUKxrAKLzPdCRkz+N8qsVkK1XxJ6kk3zuI6zaQmcKxN7CkizoDP7lXxcs/Mi2I0mxceTRjJBqlzFffLJrQ==
+"@openzeppelin/contracts@^4.4.2":
+  version "4.4.2"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.4.2.tgz#4e889c9c66e736f7de189a53f8ba5b8d789425c2"
+  integrity sha512-NyJV7sJgoGYqbtNUWgzzOGW4T6rR19FmX1IJgXGdapGPWsuMelGJn9h03nos0iqfforCbCB0iYIR0MtIuIFLLw==
 
 "@sindresorhus/is@^0.14.0":
   version "0.14.0"